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20: Sir Roger Penrose - Plotting the Twist of Einstein’s Legacy: Difference between revisions
20: Sir Roger Penrose - Plotting the Twist of Einstein’s Legacy (edit)
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[[File:Ascending and Descending.jpg|thumb|Ascending and Descending, by M. C. Escher. Lithograph, 1960.]] | [[File:Ascending and Descending.jpg|thumb|Ascending and Descending, by M. C. Escher. Lithograph, 1960.]] | ||
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== Notes == | |||
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There were three versions. The third version is in The Road to Reality. He thinks the second version is probably the best. | |||
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MC ESCHER - Ascending and Descending (The Penrose Stairs) | |||
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